Display screen with a graphical user interface



FIG. 1 is a front view of a display screen with a graphical user interface showing the new design.

The broken lines showing a display screen illustrate environment and form no part of the claimed design. All other broken lines illustrate portions of the graphical user interface that form no part of the claimed design. The closely spaced parallel diagnoal shading lines indicate translucency and are not intended to indicate surface ornamentation. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 